package io;

public class TryCatchDemo {
    public static void main(String[] args) {
        System.out.println("程序开始");
        try {
            String line = null;
            System.out.println(line.length());
        } catch (Exception e) {
            System.out.println("异常已处理");
        }
        System.out.println("程序接受");
    }
}
